feat(tenancy): connect cloud workspace control plane

tests/integration/persistence/test_migrations.py

@@ -15,6 +15,7 @@ from sqlalchemy.ext.asyncio import create_async_engine
 
 from langbot.pkg.entity.persistence.base import Base
 from langbot.pkg.persistence.alembic_runner import (
+    run_alembic_downgrade,
     run_alembic_upgrade,
     run_alembic_stamp,
     get_alembic_current,
@@ -171,6 +172,24 @@ class TestSQLiteMigrationUpgrade:
             )
         assert 'embedding_dimension' in columns
 
+    @pytest.mark.asyncio
+    async def test_directory_projection_upgrade_downgrade_round_trip(self, sqlite_engine):
+        await run_alembic_stamp(sqlite_engine, '0013_tenant_pgvector')
+
+        await run_alembic_upgrade(sqlite_engine, 'head')
+        async with sqlite_engine.connect() as conn:
+            tables = await conn.run_sync(lambda sync_conn: set(sqlalchemy.inspect(sync_conn).get_table_names()))
+        assert {'directory_projection_states', 'directory_projection_inbox'} <= tables
+
+        await run_alembic_downgrade(sqlite_engine, '0013_tenant_pgvector')
+        async with sqlite_engine.connect() as conn:
+            tables = await conn.run_sync(lambda sync_conn: set(sqlalchemy.inspect(sync_conn).get_table_names()))
+        assert 'directory_projection_states' not in tables
+        assert 'directory_projection_inbox' not in tables
+
+        await run_alembic_upgrade(sqlite_engine, 'head')
+        assert await get_alembic_current(sqlite_engine) == _get_script_head()
+
 
 class TestSQLiteMigrationFreshDatabase:
     """Tests for fresh database workflow."""